Persistent tasks database implementation #350
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To make serializing/deserializing this easier/better. These are transient values which are now propagated down the call chain instead.
To reduce size/bloat in scheduler.rs
Successfully persists stored tasks, and reconstitutes them on load. Caveats: * Design problem when reconstituting... these tasks need a Session that isn't NoopSession if they do background `notify` events. But how to get one? Some re-thinking and refactoring of session management has to be worked through, to separate the notion of "my" session created out of a connection event, a from "background" session -- still attached to the same daemon/RpcServer, and to make it possible to go in and update these suspended tasks to have the latter. * Implementation is for WiredTiger only, no Relbox yet * No task loading from textdump yet.
* Adds the concept of a SessionFactory to produce "background"
sessions.
* Resuming a task that does e.g. a `notify` now works.
* Had to refactor `RpcServer` a bit to make this work.
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Initial WiredTiger tasks DB implementation
This is a series of commits which pileup to implement persistent task save and load (on server restart). This is a feature that LambdaMOO has, allowing it to resume background tasks between server restarts, and is required for us to be at feature parity with 1.8.0.
Successfully persists stored tasks, and reconstitutes them on restart of the server.
Caveats:
.
Still this is major progress towards a 1.0 release.